Dual distributor for internalcombustion engines



May 29, 1956 o. DosTER 2,747,563

DUAL DISTRIBUTOR FOR INTERNAL-COMBUSTION ENGINES Filed NOV. 27, 1955 3 Sheets-Sheet 1 Al IQQMEY A O. L.. DOSTER May 29, 1956 DUAL DISTRIBUTOR FOR INTERNAL-COMBUSTION ENGINES 5 Sheets-Sheet 2 Filed Nov. 27, 1953 INVENTOR OLLlE. L. Dos-ren o. L. DosTER 2,747,563

DUAL DISTRIBUTOR FOR INTERNAL-COMBUSTION ENGINES May 29, 1956 3 Sheets-Sheet 3 Filed Nov. 27, 1953 INVENTOR OLUE L. DcnsTlJ?` United States Patent O DUAL DISTRIBUTOR FOR INTERYAL- COMBUSTION ENGINES Ollie L. Doster, Atlanta, Ga.

Application November 27, 1953, Serial No. 394,750

3 Claims. (Cl. 123-195) 'I'his invention relates to a dual distributor adaptor for use on internal combustion engines and has for its primary object to convert a conventional single distributor engine to a dual distributor engine.

Another object is to facilitate a rapid application of the adaptor to a conventional internal combustion engine of the type employing a distributor in its ignition system.

Another object is to provide a distributor for each bank of cylinders of a V-type engine, and to improve the operation and eiciency of engines of this type.

The above and other objects may be attained by employing this invention which embodies among its features a spacer mounted on the cylinder block of a conventional engine adjacent the open end of and in registration with the chamber which encloses the timing gears, a cover carried by the spacer and closing the open end of the chamber, and a distributor carried by the spacer and operatively connected to the cam shaft of the engine, and a second distributor carried by the cover and operatively connected to the cam shaft.

Other features include an extension thimble carried by the cam shaft for rotation therewith, said thimble projecting into the cover, longitudinally spaced drive gears carried by the thimble for rotation therewith and means carried by the distributors and operatively engaging the drive gears for operating the distributors in timed relation to the cam shaft.

In the drawings:

Figure 1 is a front view of a V-type engine showing this dual distributor system in place thereon;

Figure 2 is a fragmentary side view of the engine illustrated in Figure l;

Figure 3 is an enlarged sectional view taken substantially on the line 3 3 of Figure l;

Figure 4 is a fragmentary sectional view taken substantially on the line 4 4 of Figure 2, showing the parts on an enlarged scale;

Figure 5 is a fragmentary enlarged sectional view taken substantially on the line 5 5 of Figure 2; and

Figure 6 is a fragmentary sectional View taken substantially on the line 6 6 of Figure 5.

Referring to the drawings, in detail, an engine designated generally 10 includes a cylinder block 12 having divergent upwardly extending cylinders 14 in which conventional pistons (not shown) reciprocate. The pistons are connected through a conventional connecting rod to a crank shaft 16 which extends through the forward end of the cylinder block, as will be readily understood upon reference to the drawings. Formed in the cylinder block 12 and opening through the forward end thereof is a chamber 18 in which are housed the timing gears 20 and 22, respectively, and the timing gear 22 is fixed to the cam shaft 24 of the engine while the timing gear 20 is xed to the crankshaft 16 thereof. As shown in Figure 3, the cam shaft is provided with a forward extension 26 which under ordinary circumstances is housed within the timing ice gear cover conventionally employed to close the open end of the chamber 18.

The structure thus far described is conventional and forms no part of this invention except in combination therewith.

Under ordinary circumstances a conventional distributor is carried by the cover which closes the open end of the chamber 18 and is driven through a conventional gear (not shown) which is carried by the cam shaft 24 within the confines of the cover.

Carried by the engine adjacent and in registering relation to the chamber 18 is a spacer 28 carrying intermediate its ends a web 30 which is provided with an axial recess 32, the wall of which lies in concentric spaced relation to the extension 26 of the cam shaft 24 and carried by the wall of the recess 32 and extending thereinto is a bearing lug 34 in which is mounted for rotation one end of a distributor shaft 36 carrying adjacent the lug 34 a worm 38. Carried by the spacer 28 and extending radially outwardly therefrom is a bearing boss 40 through which is extended a housing 42 through which the shaft 36 extends, and carried on the housing 42 is a conventional distributor head 44. The spacer 28 is provided with an annular series of circumferentially spaced openings 46 which, as illustrated in Figure 3, are adapted to align with an annular series of circumferentially spaced internally screw threaded sockets 48 formed in the cylinder block 12.

Carried by the spacer 28 is a cover designated generally 50 having a flange 52 which extends outwardly therefrom and is provided with an annular series of circumferentially spaced openings 54 which are adapted to align with the openings 46 in the spacer 28 to receive bolts 56 which extend through the openings 54 and 46 and into the internally screw threaded sockets 48 with which the bolts are threadedly engaged to clamp the spacer and cover plate in place on the cylinder block 12. Carried by and extending outwardly from the cover 50 is a sleeve 58 and carried by the cover and projecting inwardly is a boss 60 which is provided with an opening 62 in which is mounted for rotation one end of a drive shaft 64 which extends through the sleeve 58 and carries at its end remote from the boss 60 and on the exterior of the cover a conventional distributor 66. Fixed to the shaft 64 adjacent the boss 60 is a worm 68.

Secured to the extension 26 of the cam shaft 24 is a thimble 70 upon which are xed for rotation therewith longitudinally spaced worm gears 72 and 74 which mesh respectively with the worms 38 and 68. It will thus be seen that when the cam shaft is rotated by the timing gears 20 and 22, the worm gears 72 and 74 will be rotated and will impart rotation to the shafts 36 and 64 through the medium of the worm gears 72 and 74, respectively.

In use, it will be obvious that as the crank shaft 16 is driven, the timing gears 20 and 22 will drive the cam shaft 24 and with the distributor 44 operatively connected to a source of electrical energy and the spark plugs of one bank of cylinders, the plugs will be selectively energized as the cam shaft 24 rotates. Likewise, with the distributor 66 operatively connected to the spark plugs of the other bank of cylinders, it will be evident that the spark plugs of the second bank of cylinders will be energized in timed relation with the operation of the crank shaft. In this way, by providing dual distributors, it will be obvious that a distributor is provided for each bank of cylinders in a V-type motor.

While in the foregoing there has been shown and described the preferred embodiment of this invention, it is to be understood that minor changes in the details of construction, combination and arrangement of parts may be resorted to without departing from the spirit and scope of the invention as claimed.

4 carried by the spacer and operatively connected to one of the drive gears, and a second distributor carried by the cover and spaced longitudinally from the rst distributor, and said second distributor being operatively connected to another drive gear.

3. A dual distributor attachment for an internal combustion engine which inclde'sacylinder block having a timing gear chamber opening through onejend-,a crank shaft extending through said chamber, lafczirrl shaft extending through said chamberV in parallelrelation to the crank shaft, and interm'eshing timing'gears 'ced by the crank shaft andthe cam shaft/within A said chambenfsaid-fatachment comprising a spacer mounted on vthe cylinder block adjacent the open' end of and in registration with the chamber, a cover carried by the spacer and closing the open end of the chamber, a distributor carried by the spacer and operatively connected to the cam shaft, a Secondidistribu'torcarried 4byftlie cover'ndlpb nctd to Ythe cam shaft 'inlngitudlna'lly spaced'r4v 5tothe first Y distributor, and "t'h'r''raided` through the cover and throughthe'spacr edly 'engagedwiththe cylinder block frhlihglespacer d CJi/"e'lfiilll place n rs'aid blk.

V"References Cited in the itile 'of this zptit Y UNITED STATES PATENTS 

